Tien Nhut Nguyen Ethan V. Munson John Tang Boyland Cheng Thao Structure-oriented Product Versioning. 456-461 2005 conf/itcc/2005-2 ITCC (2) http://dx.doi.org/10.1109/ITCC.2005.263 db/conf/itcc/itcc2005-2.html#NguyenMBT05